Textile materials and method of preparing the same



Patented Aug. 23, 1932 um'rao s'rA'rEs PATENT OFFICE GAMILLE DREYFUS,NEW YORK, N. Y, AND WHITEHEAD, OF CUMBER- LAND, MARYLAND, ASSIGNORS TOCEIIIIANIESE CORPORATION OF AMERICA, A

PORATION OF DELAWARE TEXTILE MATERIALS AND METHOD OF PREPARING THE SAME.No Drawing.

This invention relates to the preparation or treatment of textilematerials, such as yarns or filaments made of organic derivatives ofcellulose, whereby the same are rendered more amenable to textileoperations or haveother improved properties.

An object of our invention is to prepare or treat textile materials,particularly yarns or filaments containing cellulose acetate or otherorganic derivatives of cellulose, by the employment of oils or fattyacids in con unction with lecithin, whereby the yarns or filaments arerendered more pliable and can therefore be knitted, woven or knottedmore readily. Further objects of our invention will appear from thefollowing detailed description.

In many processes of conversion of textile yarns suc as twisting,winding, knitting or weaving, it is desirable to apply finishes. whichsoften or lubricate the arns. The

finishes considered most'useful or this purpose containoils, such asolive or castor oil. However when such oils are applied to the yarn,they tend to polymerize and form viscous and ummy bodies upon ageing. Wehave found that if lecithin is added to such oils, yarns to which theoil and lecithin have been applied, remain soft and not sticky whenexposed to the air fOIIlOIlg periods of time.

" In accordance with our mvention, we employ the animal or vegetableoils or the fatty acids derived therefrom in conjunction with lecithinin the preparation or treatment of textile materials particularly thosecontaining cellulose acetate or other organic derivatives of cellulose.

The animal or vegetable oils employed may be any suitable one such asolive oil, castor oil, cocoanut oil, Neatsfoot oil and ingeneralApplication filed April 17, 1980. Serial No. 445,205.

the product in a form containing some of the oils with which it occursnaturally, since pure lecithin tends to oxidize rapidly. The amount oflecithin employed may be any suit able one say from 0.5 to 5% of theweight of the oils or fatty acids employed in the textile process. i

In one form of our invention, the vegetable or animal oils or the fattyacids in admixture with the lecithin may be added to the atmosphere asin dry spinning or into a precipitating bath as in wet spinning.

In another form of our invention the mixture of the oils orfatty acidsand the lecithin may be applied to the yarns, filaments or fabrics aftertheir formation. They may be applied either alone or in admixture withother materials as a lubricant or finish. Thus the lubricant or finishmay also contain softening agents such as polyhydric alcohols, examplesof which are glycol, diethylene glycol or I glycerine.

The textile materials to be prepared or treated in accordance with thisinvention preferably contain organic derivatives ofcellulose which maybe organic esters of cellulose orcellulose ethers. Examples of suchorganic esters of cellulose are cellulose acetate, cellulose propionate,cellulose formateand cellulose butyrate, 'while ex- 'amples of celluloseethers are ethyl cellulose, methyl cellulose and benzyl cellulose.

Yarns, artificial straw or filaments when prepared or treated inaccordance with thls invention have great pliability due to-the presenceof the animal or vegetable oils or the free fatty acids, as shown by thefact that such yarns may be readily knitted into a fabric containingmany stitches per unit length, and artificial bristles, horsehair andstraw may be knotted quiteatightly and bent as quite severely withoutbreaking. Moreover when such yarns are exposed to the an for lon periodsof time, because of the presence of t e lecithin, they retain theirsoftness and pliability and can be readily knitted.

In order further to illustrate our invention, but without being limitedthereto, the following specific example is given.

Ewample- A finish is prepared as follows:

Olive oil 99 parts by weight Lecithin The above mixture is applied to ayarn consisting wholly of acetone-soluble cellulose acetate filaments,by causing such yarn to pass 1 part by weight of cellulose acetatecontaining a glyceride of a fatty acid and lecithin. 9. Textilematerials containing filaments of-cellulose acetate containing 011% oiland lecithin.

In testimony whereof, we have hereunto subscribed our names.

CAMILLE DREYFUS. WILLIAM WHITEHEAD.

over wicks, rollers or other'furnishing device for applying suchmixture, in their transit from the spinning machine in which they areformed to a winding device. The amount of finish applied is from 1 to 2%of the weight of the yarn.

The yarn so treated is quite pliable and knits well, takes high twistssmoothly and generally exhibits improved properties.

- Moreover even after ageing in the presence of air or for a long periodof time the yarn remains soft and free from stickiness.

Itv is to be understood that the foregoing" description is given merelyby way of illustration and that many variations may be their glyceridesin association with lecithin.

3. In a. process of preparing or treating textile materials containingcellulose acetate,the step of introducing olive oil in association withlecithin.

4. Process 'of improving the properties of filaments or yarns containingorganic derivatives of cellulose comprising applying thereto a finishcomprising a glyceride of a fatty acid and lecithin.

5. Process of improving the properties of textile materials containingcellulose ace-' tate comprising applying thereto a finish comprising aglyceride of a fatty acid and lecithin.

6. Process of improving the properties of filaments or yarns containingcellulose acetate comprising applying thereto a finish containing oliveoil and lecithin.

- 7. Textile materialscomprising filaments of organic derivatives ofcellulose containing a glyceride of a fatty acid and lecithin.

8. Textile materials comprising filaments

